* revised sites customisation registry (now supports module as well)
 * revised selenium binary location (added environ for compat)
 * updated docs & revised exposed APIs
 * added WorkerBreak & HookExecutionFailed for hook functions between rounds
 * added hook functions to the main process
 * moved API submission saved files to date based categories
 * bandit'ed healthcheck script
 * bandit'ed upload script
 * revised upload script according to the changes on API submission files; should now be used as a cron tab
 * minor revision on Makefile
 * added upload crontab & healthcheck service samples
 * mandatorily enable headless option on Docker environment (may not be reliable)